12879239 has 2 divisors, whose sum is σ = 12879240. Its totient is φ = 12879238.

The previous prime is 12879221. The next prime is 12879247. The reversal of 12879239 is 93297821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12879239 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12879196 and 12879205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12879259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6439619 + 6439620.

It is an arithmetic number, because the mean of its divisors is an integer number (6439620).

Almost surely, 2^12879239 is an apocalyptic number.

12879239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12879239 is an equidigital number, since it uses as much as digits as its factorization.

12879239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 12879239 is about 3588.7656652392. The cubic root of 12879239 is about 234.4031269118.

The spelling of 12879239 in words is "twelve million, eight hundred seventy-nine thousand, two hundred thirty-nine".